Myth #1: The protection lasts for more than a year
For the flu shot to be effective, you need one every year, ideally as soon as it’s available so that your defenses are raised through the entire flu season. There are two reasons for this: Just like a tetanus shot protects you for 10 years, the flu shot covers you for one. You might have some lingering protection after the 365-day mark, but it won’t be nearly as powerful.
Myth #2: Receiving the flu vaccine ensures you won’t get sick
Overall, the flu shot is about 50 percent effective, Dr. Jhung said. That doesn’t mean you have a 50-50 chance of getting the flu. Instead, it means that your personal flu risk — whatever that likelihood may be — is cut in half by getting the shot. “Think of a best friend who does all of the things you do, meets all of the same people, and so has the same exposure to the flu virus as you do,” Dr. Jhung explained. “If you had your flu shot and your friend didn’t, your risk of coming down with the flu would be about half of hers.”
Myth #3: There’s no reason to get the vaccine if you’re young and healthy
The flu is more dangerous than you might realize. Every year, about 200,000 people are hospitalized due to the flu or flu-related complications. The number of flu-related deaths swings widely from one year to another but ranges from about 3,000 to 49,000, according to a CDC analysis.
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https://www.yahoo.com/health/3-flu-v...695251677.html